170,851 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Topology Switch between AIE and ACQ: A Balance of Substituents
No full textThe publication on aggregation of benzotiazoles is available at https://doi.org/10.1021/acs.jpcc.4c00423 (J. Phys. Chem. C 2024, 128, 13, 5651–5658)The current folder contains data joined with solid state structure of studied compounds, photophysical measurements and quantum-chemical calculations.PIName: Ośmiałowski, BorysInstitution: Nicolaus Copernicus University in ToruńAddress: 7 Gagarina Street, Faculty of Chemistry, PL-87-100 Torun, PolandEmail: borys.osmialowski@umk.plCo-investigatorsName: Rybczyński, PatrykInstitution: Nicolaus Copernicus University in TorunAddress: 7 Gagarina Street, Faculty of Chemistry, PL-87-100 Torun, PolandEmail: pat_ryb@doktorant.umk.plName: Kaczmarek-Kędziera, AnnaInstitution: Nicolaus Copernicus University in TorunAddress: 7 Gagarina Street, Faculty of Chemistry, PL-87-100 Torun, PolandEmail: teoadk@umk.plName: Muzioł, TadeuszInstitution: Nicolaus Copernicus University in TorunAddress: 7 Gagarina Street, Faculty of Chemistry, PL-87-100 Torun, PolandEmail: tmuziol@chem.umk.plKeywords: fluorescence, aggregation, organic dyes, benzotiazolesLanguage: EnglishFunding: National Science Centre in Krakow, Poland, grant no. 2021/43/B/ST5/00753There is a .MD (text format) file within the folders in the repository file describing the content of the folders.</p
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
A 0.12mm<sup>2</sup> Wien-Bridge Temperature Sensor with 0.1°C (3σ) Inaccuracy from -40°C to 180°C
No full text Resistor-based temperature sensors can achieve much higher resolution and energy efficiency than conventional BJT-based sensors [1], but they typically occupy more area (> 0.25 mm 2 ) and have lower operating temperatures (le 125 {circ} {C}) [2]-[4]. This work describes a 0.12mm 2 resistor-based sensor that uses a Wien-bridge (WB) filter to achieve 0.1 {circ} {C} (3 sigma) inaccuracy from - 40 {circ} {C} to 180 {circ} {C}. Compared to a state-of-the-art WB sensor [4], it occupies 6 × less area and achieves comparable relative accuracy over a 76% wider operating range. Session 10.3 Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
Structural and synthetic insights into the chemistry of lithium tetraorganozincates
No full textMain group bimetallic complexes have emerged as powerful reagents in organometallic synthesis, exhibiting unique reactivity profiles that cannot be replicated by their homo-metallic components. This chapter focusses on a particular family of bimetallic reagents, namely higher order lithium zincates. Exhibiting the empirical formulation R4ZnLi2 (R = alkyl, aryl, alkynyl, etc.), these compounds have found widespread applications in cornerstone organic reactions such as deprotonative metalation, metal halogen exchange or C[sbnd]C bond forming processes. By switching on bimetallic cooperativity these reagents exhibit excellent functional group tolerance and regioselectivities while being kinetically activated in comparison with parent organozinc reagents R2Zn. Showcasing key selected examples here we provide an overview on the synthesis, structure, solution constitution and stability of these mixed lithium/zinc complexes and discuss their most representative applications in modern organic synthesis. A main aim of this chapter is to shed light on the close interplay between structure and reactivity in this family of mixed lithium/zinc reagents and how bimetallic cooperation can be maximized to develop more effective and regioselective synthetic protocols
A ±25A Versatile Shunt-Based Current Sensor with 10kHz Bandwidth and ±0.25% Gain Error from -40°C to 85°C Using 2-Current Calibration
No full textAccurate current sensing is critical in many industrial applications, such as battery management and motor control. Precise shunt-based current sensors have been reported with gain errors of less than 1% over the industrial temperature range (-40°C to 85°C) [1]–[4]. However, since they are intended for coulomb counting, their bandwidth is limited to a few tens of Hz, making them unsuitable for battery impedance or motor-current sensing. This paper presents a current sensor with a wide (10kHz) bandwidth and a tunable temperature compensation scheme (TCS), which allows it to be flexibly used with different types of shunts while maintaining high accuracy. A low-cost room-temperature calibration scheme is proposed to optimize gain flatness over temperature by exploiting the shunt's self-heating at large currents. Over the industrial temperature range and a ±25A current range, it achieves state-of-the-art gain error (±0.25%) with both low-cost PCB and stable metal-alloy shunts.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
kartographische Darstellung der aktuellen Situation durch Color-Infrarot-Luftbilder
No full textMEISSNER, B.: Fernerkundung bei der Grünplanung für die Stadtregion Berlin (West) ... 5 ;
FIETZ, M. & MEISSNER, B.: Zur Auswertung von Color-Infrarot-Luftbildem (Berlin/West 1979) bei der Vegetationskartierung ... 23 ;
FÖRSTER, U.: Vitalitätsbestimmung von Straßenbäumen. - Erfahrungen und Ergebnisse der Color-Infrarot-Bef 1 iegung in Berlin (West) 1979 ... 43 ;
FIETZ, M.: Lebensbedingungen von Straßenbäumen in Berlin-Neukölln ... 53 ;
BALTSCHUN, M. : Botanischer Garten - Karte der Gehölze - 1 : 1250 ... 65 ;
BORYS, 6.: Karte zum Straßenbaumkataster - Berlin (West) - 1 : 2000 ... 101 ;
ZEUNERT, C.: Karte zur Grünflächenplanung Berlin (West) - 1 : 4000 ... 121 ;
MEISSNER, B.: Grünverteilung in Berlin (West) 1 : l0 000, eine Inventur - Bestandsaufnahme städtischer Vegetation mit Hilfe von reprotechnischen Mitteln und stark limitierter Bildinterpretation durch Color-Infrarot-Luftbilder... 141 ;
MEISSNER, B., DOBBRICK, K. & MUNIER, C.: Satelliten-Fernerkundungs-Daten für städtische Grünübersicht? - Zur Einsatzfähigkeit von multispektralen Landsat-Scanner-Daten für jährliche Übersichts-Inventuren des Stadtgrüns von Berlin (West) ... 147 ;
ANHANG ... 153 ;researchDFG, SUB Göttinge
kartographische Darstellung der aktuellen Situation durch Color-Infrarot-Luftbilder
No full textMEISSNER, B.: Fernerkundung bei der Grünplanung für die Stadtregion Berlin (West) ... 5 ;
FIETZ, M. & MEISSNER, B.: Zur Auswertung von Color-Infrarot-Luftbildem (Berlin/West 1979) bei der Vegetationskartierung ... 23 ;
FÖRSTER, U.: Vitalitätsbestimmung von Straßenbäumen. - Erfahrungen und Ergebnisse der Color-Infrarot-Bef 1 iegung in Berlin (West) 1979 ... 43 ;
FIETZ, M.: Lebensbedingungen von Straßenbäumen in Berlin-Neukölln ... 53 ;
BALTSCHUN, M. : Botanischer Garten - Karte der Gehölze - 1 : 1250 ... 65 ;
BORYS, 6.: Karte zum Straßenbaumkataster - Berlin (West) - 1 : 2000 ... 101 ;
ZEUNERT, C.: Karte zur Grünflächenplanung Berlin (West) - 1 : 4000 ... 121 ;
MEISSNER, B.: Grünverteilung in Berlin (West) 1 : l0 000, eine Inventur - Bestandsaufnahme städtischer Vegetation mit Hilfe von reprotechnischen Mitteln und stark limitierter Bildinterpretation durch Color-Infrarot-Luftbilder... 141 ;
MEISSNER, B., DOBBRICK, K. & MUNIER, C.: Satelliten-Fernerkundungs-Daten für städtische Grünübersicht? - Zur Einsatzfähigkeit von multispektralen Landsat-Scanner-Daten für jährliche Übersichts-Inventuren des Stadtgrüns von Berlin (West) ... 147 ;
ANHANG ... 153 ;researchDFG, SUB Göttinge
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